Scientists have found evidence in the fossil record that the structure of certain animals have changed over time. What is the best explanation of why animal populations adapted over time?. Single choice. Species change because of use or disuse of traits.

Species became extinct and were replaced by better-adapted species.

Fossils remains provide clues as to why certain species have changed over time.

Certain mutations in species have become more prevalent over time through natural sections.

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

The term facultative anaerobe refers to an organism that